I think the biggest thing is if that learning a complex framework is hard enough, but people often just assume that their expertise in a c-like static language is immediately transferable to anything else. If you have no experience in a dynamic or functional language and want to pick something up in that area, the first thing you have to learn is how people approach problems in that different paradigm, followed by gaining a level of competence with the syntax/libraries before they can even start learning the framework.